Nah. All PS3s can play PS1 games. Some fat PS3s (but certainly not all of them) can play PS2 games.
As for copyright, the ones for download on PSN cost money, only work on the machine that purchases them, and are licensed by the owners of all the necessary copyrights, so it's all completely legal.
HUH, I didn't know that.
I guess when I heard that the slim ones wouldn't be able to play the old playstation games, the guy forgot to specify PS1 or PS2. Thanks for the info.
I guess buying it off PSN is good for you, go for it.
But if your HDD brakes, or something else happens, you'll loose the copy and they probably won't let you download it again without paying the fee a secong time. (alot of PC game companies are like that when you have to reinstall the OS and get a new IP address - or only have a certain number of free installs)
I'd rather have the original disk. It prevents stuff like that from happening.
Plus, only the games that get listed by the companies that own them, can be downloaded.
For EX: I bet you can't find an abscure title like "Kya: Dark Lineage" (one of my favorates) ^.^
And how about "Yu-gi-oh: Forbidden Memories" (can you find that one on PSN? )